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Graphite Ore Dressing Methods
Type:Industry News  Time:2011/11/13 20:28:46  Read:

There are many graphite ore dressing methods , such as flotation, electrical concentratrion, and gravitational concentration. Flotation is the most widely used.
 
1. Flotation

Flake graphite has good floatability, so in most conditions, floatation method is adopted to sort graphite. As for flotation reagent, kerosene or diesel oil are usually used as collector agent, No 2 oil or new flotation oil as foam flotation agent in China. After many years producing practice, No 4 oil is considered as the ideal graphite dressing foam agent. Overseas, besides the above reagent, other reagents are also used, such as heavy oil, phenols, sulfonic acid ester, and carboxylic acid. Sometimes several regents are mixed to use.
 
Cryptocrystalline graphite has a poor flotability, flotation method can just play an enrichment role. Cryptocrystalline graphite has a high grade, after flotation, beneficated ores and tailings can be sold as different quality produts. In most cases, ores are selected by hands and milled before being sold.

There are often mica and other silicate minerals in graphite ores. During flotation, to curb these minerals,  water fluctuations, starch, dextrin, organic gum cellulose and other reagents are be used. If pyrite content is high, lime and oxides can be added.

【Graphite Ore Dressing Methods】
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Qingdao Hensen Graphite Co., Ltd|Spherical graphite|AA Method High Purity|Expandable Graphite